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Experimental and simulated performance of hot mirror coatings in a parabolic trough receiver

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  • Kaluba, V.S.
  • Mohamad, Khaled
  • Ferrer, P.

Abstract

Thermal radiation is the dominant heat loss mechanism for receiver units on a parabolic solar collector plant at high temperatures. Reduction of these losses is traditionally achieved through the use of an optically selective coating on the absorber pipe, which absorbs visible light well but emits poorly in the IR region. Another possibility is the use of a hot mirror coating on the glass cover of the receiver, which reflects thermal radiation back onto the absorber pipe for reabsorption. In this paper, novel experimental results of a receiver unit operating with a hot mirror coating are presented, and the results between a developed model and a simulation are compared. It is seen that the correspondence is encouragingly close (Chi-squared test p-values between 0.995 and 0.80), where the simulation underestimates the experimental performance. Further, simulations to investigate the performance of various candidates for hot mirror coating (ITO, Gold, and Silver) in a Solar trough receiver are presented, where it is seen that the hot mirror coating has access to higher temperature regions (above 700 K). Lastly, optical parameter variation effects were simulated, related to overall plant efficiency and compared to existing selective coatings.

Suggested Citation

  • Kaluba, V.S. & Mohamad, Khaled & Ferrer, P., 2020. "Experimental and simulated performance of hot mirror coatings in a parabolic trough receiver," Applied Energy, Elsevier, vol. 257(C).
  • Handle: RePEc:eee:appene:v:257:y:2020:i:c:s0306261919317076
    DOI: 10.1016/j.apenergy.2019.114020
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    References listed on IDEAS

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    Cited by:

    1. Shinde, Tukaram U. & Dalvi, Vishwanath H. & Patil, Ramchandra G. & Mathpati, Channamallikarjun S. & Panse, Sudhir V. & Joshi, Jyeshtharaj B., 2022. "Thermal performance analysis of novel receiver for parabolic trough solar collector," Energy, Elsevier, vol. 254(PA).
    2. Mohamad, Khaled & Ferrer, P., 2021. "Thermal performance and design parameters investigation of a novel cavity receiver unit for parabolic trough concentrator," Renewable Energy, Elsevier, vol. 168(C), pages 692-704.
    3. Qimei Chen & Yan Wang & Jianhan Zhang & Zhifeng Wang, 2020. "The Knowledge Mapping of Concentrating Solar Power Development Based on Literature Analysis Technology," Energies, MDPI, vol. 13(8), pages 1-15, April.
    4. Qiu, Yu & Xu, Yucong & Li, Qing & Wang, Jikang & Wang, Qiliang & Liu, Bin, 2021. "Efficiency enhancement of a solar trough collector by combining solar and hot mirrors," Applied Energy, Elsevier, vol. 299(C).
    5. Alamdari, Pedram & Khatamifar, Mehdi & Lin, Wenxian, 2024. "Heat loss analysis review: Parabolic trough and linear Fresnel collectors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 199(C).
    6. Stanek, Bartosz & Węcel, Daniel & Bartela, Łukasz & Rulik, Sebastian, 2022. "Solar tracker error impact on linear absorbers efficiency in parabolic trough collector – Optical and thermodynamic study," Renewable Energy, Elsevier, vol. 196(C), pages 598-609.

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